nfs: nfs_do_{ref,sub}mount() superblock argument is redundant

It's always equal to dentry->d_sb

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 13 insertions, 18 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index f0234118d044..e94ad22da5d2 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -163,10 +163,10 @@ static inline void nfs_fs_proc_exit(void)
 
 /* nfs4namespace.c */
 #ifdef CONFIG_NFS_V4
-extern struct vfsmount *nfs_do_refmount(struct super_block *sb, struct dentry *dentry);
+extern struct vfsmount *nfs_do_refmount(struct dentry *dentry);
 #else
 static inline
-struct vfsmount *nfs_do_refmount(struct super_block *sb, struct dentry *dentry)
+struct vfsmount *nfs_do_refmount(struct dentry *dentry)
 {
         return ERR_PTR(-ENOENT);
 }
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 859cdaba4c1c..c0b8344db0c6 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -25,8 +25,7 @@ static LIST_HEAD(nfs_automount_list);
 static DECLARE_DELAYED_WORK(nfs_automount_task, nfs_expire_automounts);
 int nfs_mountpoint_expiry_timeout = 500 * HZ;
 
-static struct vfsmount *nfs_do_submount(struct super_block *sb,
-                                        struct dentry *dentry,
+static struct vfsmount *nfs_do_submount(struct dentry *dentry,
                                         struct nfs_fh *fh,
                                         struct nfs_fattr *fattr);
 
@@ -164,9 +163,9 @@ struct vfsmount *nfs_d_automount(struct path *path)
         }
 
         if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
-                mnt = nfs_do_refmount(path->mnt->mnt_sb, path->dentry);
+                mnt = nfs_do_refmount(path->dentry);
         else
-                mnt = nfs_do_submount(path->mnt->mnt_sb, path->dentry, fh, fattr);
+                mnt = nfs_do_submount(path->dentry, fh, fattr);
         if (IS_ERR(mnt))
                 goto out;
 
@@ -230,19 +229,17 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
 
 /**
  * nfs_do_submount - set up mountpoint when crossing a filesystem boundary
- * @sb - superblock of parent directory
  * @dentry - parent directory
  * @fh - filehandle for new root dentry
  * @fattr - attributes for new root inode
  *
  */
-static struct vfsmount *nfs_do_submount(struct super_block *sb,
-                                        struct dentry *dentry,
+static struct vfsmount *nfs_do_submount(struct dentry *dentry,
                                         struct nfs_fh *fh,
                                         struct nfs_fattr *fattr)
 {
         struct nfs_clone_mount mountdata = {
-                .sb = sb,
+                .sb = dentry->d_sb,
                 .dentry = dentry,
                 .fh = fh,
                 .fattr = fattr,
@@ -262,7 +259,7 @@ static struct vfsmount *nfs_do_submount(struct super_block *sb,
         mnt = (struct vfsmount *)devname;
         if (IS_ERR(devname))
                 goto free_page;
-        mnt = nfs_do_clone_mount(NFS_SB(sb), devname, &mountdata);
+        mnt = nfs_do_clone_mount(NFS_SB(dentry->d_sb), devname, &mountdata);
 free_page:
         free_page((unsigned long)page);
 out:
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 46942e2680a0..bb80c49b6533 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -161,20 +161,18 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
 
 /**
  * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
- * @sb - superblock of parent directory
  * @dentry - parent directory
  * @locations - array of NFSv4 server location information
  *
  */
-static struct vfsmount *nfs_follow_referral(struct super_block *sb,
-                                            struct dentry *dentry,
+static struct vfsmount *nfs_follow_referral(struct dentry *dentry,
                                             const struct nfs4_fs_locations *locations)
 {
         struct vfsmount *mnt = ERR_PTR(-ENOENT);
         struct nfs_clone_mount mountdata = {
-                .sb = sb,
+                .sb = dentry->d_sb,
                 .dentry = dentry,
-                .authflavor = NFS_SB(sb)->client->cl_auth->au_flavor,
+                .authflavor = NFS_SB(dentry->d_sb)->client->cl_auth->au_flavor,
         };
         char *page = NULL, *page2 = NULL;
         int loc, error;
@@ -224,7 +222,7 @@ out:
  * @dentry - dentry of referral
  *
  */
-struct vfsmount *nfs_do_refmount(struct super_block *sb, struct dentry *dentry)
+struct vfsmount *nfs_do_refmount(struct dentry *dentry)
 {
         struct vfsmount *mnt = ERR_PTR(-ENOMEM);
         struct dentry *parent;
@@ -257,7 +255,7 @@ struct vfsmount *nfs_do_refmount(struct super_block *sb, struct dentry *dentry)
             fs_locations->fs_path.ncomponents <= 0)
                 goto out_free;
 
-        mnt = nfs_follow_referral(sb, dentry, fs_locations);
+        mnt = nfs_follow_referral(dentry, fs_locations);
 out_free:
         __free_page(page);
         kfree(fs_locations);